A short time afterwards it was definitely arranged between the conspirators that the Duke of Savoy should give his third daughter in marriage to the Maréchal, with a dowry of five hundred thousand golden crowns; that the Spanish monarch should cede to him all his claims of sovereignty upon the duchy of Burgundy; and that the Condé de Fuentes[178] and the Duke of Savoy should march their combined forces into France, thus disabling Henry from pursuing his design of reconquering the long-coveted duchy. This treasonable design, owing to circumstances upon which the impetuous Biron had failed to calculate, proved, however, abortive; and he had no sooner convinced himself of the fact, and comprehended the perilous position in which he had been placed by his imprudence, than he hastened to Lyons, where the King was then sojourning; and having obtained an audience, he confessed with a seeming frankness irresistible to so generous and unsuspicious a nature as that of Henry, that he had been sufficiently misled by his ambition secretly to demand from the Duke of Savoy the hand of his younger daughter; and that, moreover, in the excess of his mortification at the refusal of his Majesty to appoint a governor of his own selection at Bourg, he had even been induced to plot against the state, for both which crimes he humbly solicited the royal pardon. Full well did Henry and his minister remember this occurrence; nor could the King forget that although he had urged the Maréchal to reveal to him the whole extent of the intrigue, he had dexterously evaded his most searching inquiries, and constantly recurred to his contrition. Henry owed much to Biron, whom he had long loved; and with a magnanimity worthy of his noble nature, after a few expostulations and reproaches, he not only pardoned him for what he believed to have been a mere temporary abandonment of his duties, but even assured him of his future favour, and bade him return in all security to his post. Unhappily, however, the demon of ambition by which the Duke was possessed proved too powerful for the generous clemency of the King, and he resumed his treasonable practices; but a misunderstanding having ensued between himself and the false friend by whom he was now betrayed, all the private documents which had been exchanged between himself and the foreign princes through whose aid he trusted to obtain the honours of sovereignty, were communicated on this occasion to the monarch whose dignity and whose confidence he had alike outraged.